Bug #20432 mysql client interprets commands in comments

Description:
in 4.1 mysql command client interprets named commands even in comments, in 4.0 it does not.

How to repeat:
% ( echo '/*' ; echo 'use' ; echo '*/' ) | mysql-4.0/client/mysql
% ( echo '/*' ; echo 'use' ; echo '*/' ) | mysql-4.1/client/mysql
ERROR at line 2: USE must be followed by a database name

same with other commands, e.g. 'status'

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/7624

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/9108

pushed to 4.1.21-maint

in 4.1.21

Noted in 4.1.21 changelog.

The mysql client did not ignore client-specific commands (such as use
or help) that occurred as the first word on a line within
multiple-line /* ... */ comments.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/117594

3089 Joerg Bruehe	2010-09-06
      Fix bug#56547
      Bug#20432 is back: mysql client interprets commands in comments
      
      The problem was not caused by a change in the client,
      rather by the tests using the Windows built-in "echo"
      and not the one built bby MySQL.
      This again happened because the binary was missing in the package,
      caused by the wrong macro being used to build it in "cmake".

Sorry for the above entry, it doesn't belong here
but just to bug#56547.